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' B. HALL.

MACHINE FOR OORRUGATING TUBES. No. 541,535. PatentedJune 25, 1895.

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B-.HALL. MACHINE FOR CORRUGATING TUBES.

No. 541,535.. Pat ented Jl l n e 25, 1895.-

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. B. HALL, MACHINE FOR GORRUGATING TUBES.

No. 541,535; Patented June 25, 1895'.

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No. 541,535. Patented June 25, 1895.

- UNITED STATES PAT NT OFFICE.

BICKNELL HALL, OF TAUN TON, ASSIGNOR TO THE WAIN WRIGHT MANUFAC- TURINGCOMPANY OF MASSACHUSETTS, OF BOSTON, MASSACHUSETTS.

MACHINE FOR CORRUGATING TUBES.

SPECIFICATION formingpart of Letters Patent No. 541,535, datedJune 25, 1895.

. Application filed September 4, 1894. Serial No. 522,145. (No model.)

To aZZ whom it may concern:

Be it knownthat 'I, BICKNELL HALL, of Taunton, in the county of Bristoland State of Massachusetts, have invented a new and useful Improvementin Machines for Corrugating Tubes, of which the following is aspecification.

My improvement relates to that class of machines in which the tools areautomatically set and withdrawn in a certain order so that thecorrugation will be properly begun and will be concluded at the propertime.

My present invention consists in such a construction and arrangement ofparts that the tools will be thrown out of action on the approach of thecarriage in which the tube is clamped.

My invention will be understood by reference to the drawings, in whichFigure 1 is a side elevation, and Fig. 2 a plan, of acorrugating-machine embodying my invention, Fig. 3 being a frontelevation,

partly in section, of the head-stock, and Fig. 4 a cross-sectionthereof. Fig. 5 is a perspective view showing the head-stock andcarriage about to engage.

A is the frame upon which is carried two journal boxes B. A hollow shaftmounted in these journal boxes carries a pulley O and a head stock D.The shaft is hollow in order that the tube may be fed through it duringthe corrugating operation.

E, E are ways upon which slides the car riage F. These ways aresupported upon suitable legs G. The carriage is of construction ordinaryin such machines, and grips the tube and is fed with it.-

The head stock or tool carrier D consists of a casting in which aremounted a number of tool holders H, &e. The tool carrier shown in Figs.3 and 4 is intended to have a series of six tools h, 723,850., threeonly of which are shown. Each of these tools h, 712 is carried on asuitable axis, but the location of each tool upon its axis depends uponits number in the series, the first tool being in the position, sayshown at h in Fig. 4 and the sixth or last tool in the series being atthe other extremity of the axis of its tool holder, the intermediatetools being located at intermediate positions on their axes so that whenthe [an advancing movement.

tools lie in position about a piece of tube, they altogether willindicate a spiral line about it. This will be readily understood bythose skilled in the art.

The lower part of each tool holder H, 850., is square in cross sectionand lies in a square opening through a circular bushing J, so that byturning the bushing, the tool may be set and is threaded .as shown at hand passes into a nut K capable-of a rotary but not of are provided inthe walls of r the head stock and each nut is provided with holes in itsperiphery in which pins k, k may be inserted to turn the .nut. Byturning each nut its tool will be advanced or'withdrawn from its work.These nuts K are operated automati-' cally as follows: Upon'the carriageis mounted a part which engages with the pins It, when such a length oftube has beencorrugated that the, carriage is close to the head stock.

Thus as thehead stock rotates each pin projecting from the front of thehead stock, strikes this part, which may be called a finger, and is heldback while the head stock rotates past it and the pin as itwipes pastthe finger, turns the nut, thus withdrawing the tool.

' I prefer to construct the finger as shown at f in the drawings. It isthere mounted at one end of the short shaftf' mounted on the carriage.At the other end of this shaft is a second finger j at about rightangles to the fingerf, the two fingers'normally lying in the positionshown in Figs. 1 and 2. v

A pin L projects from the face of the head stock in such position 'thatwhen it reaches a certain point in its rotation, should the finger 1 fbe within reach, it will engage with the linger f and throw it into theposition shown in Fig. 5 so that the pin f will lie in position tostrike each one of the pins k in turn as Suitable slots k the head stockrotates, turning at the same time the nuts K','the back of the finger flying against the carriage so as to hold the fingerf in place. Each pin7.0 wipes against the finger f as the head stock turns and is moved byit so as to turn its nut K. The pin L is so placed in the tool carrierthat the first nutK to be turned, and consequently the first tool to bewithdrawn, will be the leading tool of the six which are making thecorrugation.

In order to withdraw the tools at other times and to throw them in atall times,I prefer to use a slide M which runs in ways on on the bed ofthe machine. On this slide are mount ed two uprights P, Q so placed thatby moving the slide M one way or the other one of these uprights will bewiped by one of the sets of pins 7r,7a and will turn them so that thesenuts will be turned one way or the other. so as to throw in orwithdrawthe tools. The upright P is the starting uprightand the uprightQ the withdrawing upright. For example, to start up the machine theslide is so moved that the uprightP will stand in the path of the pins71: which when the tools are out of action, will project inthe directionof the motion of the tool carrier. These pins 70 project from the backside of the head stock, and when the head stock is started, each pinwill strike the upright P and will be pushed round nearly flush with thebackside of the head stock again, as it passes the upright, so that eachnut will be turned say one quarter of a revolution and will advance itstool a given amount. The slide is preferably moved by a hand lever Npivoted at non one of the ways and connected to the slide by a slottedconnection m.

It is necessary that each tool should be advanced a little nearer theaxis of the tube to 1 be corrugated than the tool in front of itinseries so that each tool may do its own part of the corrugatingoperation. \Vhile this may be done by giving each nut K a little greaterturn than the nut in front of it in series, I prefer to accomplish thesame result by giving each tool shank and its nut a thread of adifferent pitch from all the others so that while, for example, aquarter of a revolution will advance the first tool it say one-sixteenthof an inch, a corresponding turn will advance the second tool threethirty-seconds of an inch,-

and screwed into its nut K, being held in place by the set nut Theoperation of this mechanism will now Each tool is adjusted'by its bedescribed.

screws (1, cl so that all will lie in such relation to each'other thatthey will track a thread of the proper pitch about the tube, each toolfollowing in the path of its leader. They are then adjusted to thediameter of the tube to be corrugated so that upon turning the nuts tobring the tools into action, the tools will be in position to make thedesired corrugation, each corrugating the tube somewhat more than thetool which has gone in front. In practice the first tool is adjusted sothat when in place it will rest lightly on the tube and track it. Thenext tool is intended to run in the track made by the first tool andmake its corrugation slightly deeper and so on. The tube is put in placeand fastened in the carriage and the machine is started up to rotate thehead stock. The upright P is moved into position to be struck by thepins 70 at such a time that it will be first wiped by the pink belongingto the tool 72. As the head stock rotates, each pin 70 engages in turnwith the upright P and each tool is brought into engagement with thetube. The slide-is then moved into an inoperative position. The tubewill be fed by the tools in a way now well known in the art to draw thecarriage and tool carrier together. hen they are in the position shownin Fig. 5,the desired length having been corrugated, the pin L comingaround, Will strike the leverf throwing it into the position shown inFig. 6 so that it will immediately be wiped by the pin 7d belonging tothe first tool in the series, and will turn it so that the parts willlie in the position in which they were before the pins 7r. engaged Iwith the upright P, thusturning the nut K,

for example, nearly a quarter of a revolution. This will withdraw thetool It so that it will not engage any longer with the tube. The samething happens with the pin 70' on the next nut, and so on, untitall thetools have been withdrawn and the tube is free to be re moved, or afterbeing relocated in the carriage, to be pushed along so that anotherportion of it may be corrugated.

The machine above described is an improvement upon other machines fordoing similar work, in that the element which in fact causes thewithdrawal of each tool is located directly upon the tube carriage, andeach tool is provided with a part which, under certain conditions,engages with this element on the tube carriage. Thus when the tubecarriage comes in close proximity with the tool holder or head stock,the part located on the tube carriage comes in direct contact with thewithdrawing element of each tool in turn without the interventionof anyother mechanism. Moreover by using two screws cl, d to adjust thebushing in the manner shown, the adjustment may be made with greataccuracy.

That I claim as my invention is 1. In a tube corrugating machine havinga tool carrier and a tube holder, one adapted to be moved toward andfrom the other, one or more tools located in said tool carrier and eachprovided with means whereby it maybe withdrawn from the axis of the toolcarrier independent of all the others, and an arm located upon said tubeholder and adapted to engage with the withdrawing means of each tool inturn when said tool carrier and tube holder are in close proximity, allas set forth.

2. In a tube corrugatin g machine a tool carrier carrying one or moretools each provided with a withdrawing mechanism, and a tube holder, theone adapted to be moved toward and from the other, in combination withmechanism located upon said tube holder adapted to be thrown to engagewith and operate the withdrawing mechanism of each tool when the tubeholder and head stock are in close proximity, and a pin located uponsaid tool carrier adapted to engage with and throw said mechanism uponthe tool holder into engaging position, all as and for the purposes setforth. 7

3. In a tube corrugating machine, a head stock one or more corrugatingtools mounted on the end of a square shaft adapted to slide in a bushingtoward and from the axis of the head stock, said bushing being providedwith an ear located between two set screws suitably mounted in said headstock whereby it may be adjusted about its axis, as set forth.

4. In a tube corrugating machine, atool carrier carrying one or moretools, the outer end of the shank of each of which is threaded, andmechanism whereby each of said tools may be adjusted toward and from theaixs of the head stock, said mechanism consisting of a nut adapted torotate but prevented from moving otherwise and provided with one or morepins, each scribed.

5. In a tube corrugating machine a tool carrier carrying a series ofcorrugatin g tools, the shank of each of which is threaded and providedwith a nut adapted to rotate but prevented from moving otherwise, thethreads of each shank diifering in pitch from the threads of all theother shanks, all as and for the purposes set forth.

6. In a tube corrugating machine having a tool carrier carrying one ormore corrugating tools, the shank of each of which is threaded andprovided with a nut adapted to rotate but adjustable therein, asdeprevented from advancing, means for adj usting the advance of such atool consisting of apin projecting from its nut and adjustable therein,and a part adapted to engage with said pin and cause it to turn saidnut, as and for the. purposes set forth.

7. In a tube corrugating machine a tool holder and a tube holder, one ofwhich is movable toward and from the other, and one of which rotates,one or more tools carried by said tool holder having threaded shanksprovided with nuts which rotate but do not ad- Vance; pins projectingfrom said nuts and a part adapted to come in contact with said pins andthereby turn the nuts, substantially as described.

In testimony whereof I have hereunto set my'hand this 9th day of August,1894.

BICKNELL HALL.

- \Vitnesses:

GEORGE O. G. COALE, EVA A. GUILD.

